If you've got plenty of time to spare, money to spend on bird housing not to mention the price of the birds/chicks/eggs themselves (some varieties are more affordable than others)....and it helps if you're a glutton for punishment, you could raise ornamental pheasants instead
http://www.townsendsornamentals.co.uk/Pheasants.php
They're gorgeous, they're quiet, and their eggs are not THAT much smaller than a chicken's egg, though they don't lay as heavily (every other day or so) and are naturally seasonal layers....BUT, apparently, artificial light will extend their laying season just like it will a chicken....I didn't even know that until I recently asked the hatchery owner who sells us quail & chukar chicks....he said he's getting eggs right now from all gamebird species with just 14 hrs of light from a little 60 watt bulb. So you might be able to squeeze a few more eggs out if you do that. I've read 2 pheasant eggs = 1 chicken egg in baking, but when I scramble 'em up I find pheasant eggs to be more like 2/3 the size of an average chicken egg.
They're nothing like raising chickens or even guinea....or even quail or partridge for that matter. BUT if you are keeping a small flock, or a few pairs in individual pens, you are far less likely to encounter the problems that can arise in large-scale pheasant production where you are housing many birds in one place and trying to keep them from tearing each other to pieces

I raise quail and chukar on a large scale, have thought of doing pheasants but everything I know about it scares me a little bit, quail are a piece of cake by comparison. BUT a few years back we had just a couple regular Ringneck roosters and a few hens, in two seperate places, one rooster per pen with his hens....now those were virtually trouble-free and I think they all lived to be 6 or 7 years old or more. I'd love to have a few pairs of ornamentals if I had the space for extra pens
